Absolutely none. Don't get dragged into believing that uk domains follow the same pattern as dot coms. Welcome to Acorn.
.co.uk are generally worth more than .uk llll domains are generally worthless, unless a word, an acronym, or something potentially brandable. I registered a few early on, but only hold one or two brandables now. lll names are valuable though.
You never see an lll.co.uk sell for less than £200-250 on DL - even for low quality letters. llls with better letters normally make £500-750. llls that are words, names or common acronyms usually quite a bit higher still.
So sorry - had totally missed that. In that case, almost every nnnn is completely worthless. There will be a few exceptions (0800, 0207 and the like), but you won't find any buyers for the usual random stuff
Popular phone prefixes (area codes, free phone services, premium rate lines, etc.) They're very very very unlikely to be still available, so if you find a free to register nnnn.co.uk then it's going to be 99.999% likely it's still available because it has no particular meaning or significance here, and therefore no potential buyers.
I was not looking at hand registering ones Thanks everybody your responses will help me in making some informed decisions
With the greatest of respect, if you don't know why 0207 may have some value, then targeting UK domain purchases rather than registrations, with little knowledge of the UK may be your downfall. Proceed with extreme caution. You did the right thing asking on here first.
From the flag on your profile, it seems you're in Japan. Why not focus on domains that might sell in your local market?
I do sell in my local market (Japan) and even in some other markets (US, China, India) and plan is expanding into other markets (like UK, US and some more) that's why the research on value of different domain patterns. Thanks for the information